Help With Fan Script

[OldSchool]

Hi everyone,

I have a pi4, 4gb, with retropie 4.6. I installed a fan and created the scripts for it according to this:

https://hackernoon.com/how-to-control-a-fan-to-cool-the-cpu-of-your-raspberrypi-3313b6e7f92c#.9j5869iq2

The issue I'm having is that when I try to create the symbolic link I type in the command line

sudo update-rc.d /etc/init.d/fanstart defaults

with fanstart.sh being my startup script in the init.d directory, and what I get back is

update-rc.d: error: initscript does not exist: /etc/init.d//etc/init.d/fanstart.sh

I've made it executable with the chmod +x command but for whatever reason it keeps coming up as not existing.

I can run the actual fan script fine if I start it manually from the command line, and it works other than the fact the fan doesn't shut off when it should (which is a different problem), but my focus now is just to get the script to start on boot. Maybe with the way retropie is setup there is a better way to start something in boot than a script in the init.d directory. I'm unsure.

I know it's more of a general raspberry pi problem, but I don't know if there is a better place to ask this because I figured there has to be someone here who has made a startup script for retropie, and because of how retropie is setup the way to set up the script might be different than on generic raspbian, and I would get better help here than in a different forum.

Thank you for any help you might have.

[mitu]

Recent Raspbian OS releases don't use SysVInit style scripts to start/stop services, so the service part from that page doesn't apply. Look up how to create a systemd service to start your python script on boot - see an example here.

[OldSchool]

@mitu
Ah, got it. I thought my method might be out of date but I'm new to digging this deep, and it's a frustrating but fun learning process. Thank you a ton for the help, I'll check that out once I get the chance today.